Emerging-market stocks climbed for a fourth day as President Vladimir Putin said Russia will do all it can to end the Ukraine conflict, spurring speculation tension will ease. The ruble and South Korean won advanced.

A group of technology companies, including Facebook Inc., Google Inc. and Apple Inc., opposed the bill because of what it called an “unacceptable loophole that could enable the bulk collection of Internet users’ data.”

U.S. stocks fell, with the Standard & Poor’s 500 Index headed for a one-month low, while Treasuries and the yen gained as the Federal Reserve said it would make further reductions in economic stimulus and as emerging-market currencies weakened. Gold and natural gas climbed.

Twitter Inc. was sued for $124 million by two financial firms that claim the Internet company engineered a failed private sale of its shares to pump up investor interest for its planned initial public offering.

Apple Inc. and Facebook Inc. will report quarterly earnings this week that underscore the technology industry’s division into two camps: providers that are adapting to shifting mobile and Web tastes, and those that have lagged behind.